Distilling combustible materials.



lbelt whom it may concern:

lle it known that l, Guanine Foxwrnn, a citizen of the UnitedStates,residing, at Baltimore, in the State of Maryland, have invented acertain new and useful Process of Distilling Combustible Materials, ofwhich the following is a specification.

The present invention relates to the treat ment of certain combustiblematerials, such as coal, and has for its object, the recovery ofby-products such as benzol and ammonia. therefrom in greater quantitiesthan has. heretofore been obtained.

Heretofore, benzol and ammonia have generally beenv recovered fromcombustible materials by burning the materials in byroduct ovens withoutprior treatment.- gulch a process has never yielded the entire possiblebyproduct content of combustible material, such as coal, in that undersuch process the rise of temperature is too test.- As is well known averyhigh temperature I will produce a high yield of gas, due to theoxygen present being expelled as carbonic oxids. but a low yield ofammonia tar and coke. The reverse exists with a low temerature, theyield of ammonia tar and coke sing high and the yield of gas being low,

due to the oxygen present being chiefly converted to water.

In the present invention his proposed to supply water during destructivedistillation, by the admixture of a chemical. substance which will notgive up its entire water con- 7 tent until after a degree of'heat hasbeen-- reached in the distillation process, that will have caused allotthe, desiredhy-products to be distilled over. This is preterablg; aocom+plished by treating the combustible-mate? rials before they "aredistilled, with a water solution of calcium chlorid and an oxygenbearing'conipound of boron. This will retard combustion owing to'thewater being slowly expelled from the added solution,

some ot the' water being. retained oven until 1 after attainment ofateni erature sufificient' to volatilize allot the ate sought utter. Tnother wordslbythe tiwfall the Water has been expelledtromthe c emicalcompound theb products wurhm been distilled over,. and the'fire maythereatter he 're'gulated yrith specification ct Lettera Patent.

o tcommerc1al borax to 918 v cium 'chlorid of 72% purity, will make thePatented h ebmdyltltlhh hpplldatlonfiledhcbruaWhtl,1917. serraiuartatec.

respect to the product, tor example cohegto for the boron compoimd andthis bei'ng dis together with calcium chlo- I 382 pounds I:

solved in water, met, in the proportions of say,

pounds at calchlorin .and boron molecularly equivalent.

In practice, the material is sprinkled with the solution in suficieiitquantltmflthe material being thoroughly inixedor turned over during thetreatment. When material is ready to be distilled;

l claim:'-- i l. The process or recovering ammonia; and

light coal tar oils from combustible mar alswhich consists in distillingsuch -comso treated, the

bustible'materials in a by firoduct oven in the presence ot a substanceacteristlcs' ct borax together with a waterbearingsubstance that retainsa portion of' its water content until the combustible maaving thechar:

terial has reached a temperature beyond that at-which the said lightoils will distil over;

I 2. The process of diefilling combustible .7

materials, which consists in treating such materials with a mixture ofcalcium chlorid with an oxygen-bearing compound of boron, and thendistilling the combustible materials so treated,,in a' byproduct-oven.

3; The process of. recovering benzol and, ammonia from combustiblematerials which. consists in treating the-combustible mate;

rials with a solution of calcium chloridj and borax and then distillingsaid c materials in a by-product oven, :j a

jtf'llhe recess of recovering benzol'and ammonia rom combustiblematerials'which consists in treating the combustible materials'with asolution of calcium chlorid and borax inabout the proportions of382'pounds oficommercial borax to9l8' ounds of cal- 'mbust ible ciumchlorid and thenl'distil ing saidfcont-p bustible materials aby-product,mm; 1 z

The'toregoing specification signed atwB ltimore, -Maryland, i this 21stday ot l'tebruary, 1917... 1

